Hikaru Masai

Hikaru Masai, who has gone by the stage names Hikaru and currently Helical, is a Japanese pop singer. She was one of the core members of the vocal group Kalafina, which was started by Yuki Kajiura to perform anime television and film theme songs. She is from Toyama Prefecture. In 2007, she was selected to join Kalafina in an audition held by Sony Music Japan, and debuted on their second single "Sprinter" in 2008. During her ten years there, Kalafina released five studio albums and two compilation albums, all of which have charted in the Oricon top 10. Her Kalafina profile describes her voice range as the mid-to-high register, a wide range that is "powerful, stylish, and sharp". Following the resignation of music composer Yuki Kajiura from Space Craft, Hikaru would later leave the label on October 20, 2018, after her contract expired.